Roof construction.



W. D. PLUE.

ROOF CONSTRUCTION.

APPLICATION FILED 11.11.23, 1911. RENEWED MAR. 26, 1914.

1,117,600. Patented N0v.17,1914

WITNESSES: Z l/Vl/E/V TOR rBY nnrrnn s'rarns PATENT orrrcn WILLIAM D. PLUE, OF RAINIER, OREGON, ASSIGNOR TO PACIFIC TANK AND SI LO COMPANY, OF PORTLAND, OREGON, A CORPORATION OF OREGON.

ROOF CONSTRUCTION.

Specification of Letters Patent.

Patented Nov. 17, 1914.

Application filed January 23, 1911, Serial No. 604,222. Renewed March 26, 1914. Serial No. 827,492.

To all whom it may concern State 10f Oregon, have invented certain new and useful Improvements in Roof Construction, of which the following is a specificatlon.

Thisinvention relates to roofs and, more particularly, to roofs for silos having circular walls.

The object of my invention is to provide a relatively simple and inexpensive roof ofthis character and whereof the component parts may be fitted at a factory, be economically transported to the place of erection in a knock-clown condition, and then be set up by unskilled labor, or at least at less expense than is possible with other circular roofs with which I am familiar.

To these ends, the invention consists in a framed panel construction of roof embodying a number of novel structural features and combinations thereof, as will be herein after described and claimed.

In the accompanying drawings, Figure 1 is a fragmentary plan view of a silo-roof illustrating the invention. Fig. 2 is a transverse vertical section of the same. Fig. 3 is a sectional detail view to an enlarged scale.

The reference numeral 5 designates the circular wall of a silo. superposed upon said wall is a roof involving the present invention. Said roof is provided with a plurality of spaced rafters 6 which are disposed radially with respect to the vertical axis of the silo-wall and have their upper ends seated in a peripheral rabbet 7 pro vided in an annular shaped casing 8. The lower ends of the rafters may terminate at the wall or, as illustrated, be recessed to furnish bevel cuts 9 upon the respective rafters to afford bearings to seat upon said wall, while the reduced rafter-ends 10 will project beyond the outer surface of the wall. The rafters are each provided in their sides with substantially rectangular grooves 11 which are arranged parallel with the upper faces of the respective rafters and, desirably, at a distance therefrom so that the lower groove-surfaces 12 will coincide with the outer edge 13 of the wall. Interposed between the adjacent rafters are sectorshaped panels comprising groups of roof boards 14 which are formed from pieces having parallel sides and, as shown in Fig. 3, their sides are made to inter-fit, as by the provision of a tongue 15 along one edge of each and groove 16 along the opposite sides to receive the tongues of the adjoining pieces. Said boards are laid, as shown in Fig. 1, that is to say, they are placed so as to be parallel to one of the rafters and in angular relation to the other rafter which serve to inclose the boards of a panel. The inner ends of the mnel-boards extend into the casing-rabbet 7 or into the grooves 11 of the various rafters and those which enter such grooves are cut to provide an inclined edge 17 and thus furnish a close fit against the inner surface 18 of the rafter-grooves As best illustrated in F 3, in the upper surfaces of the boards 14' and in proximity of their side edges, are provided grooves 19 which serve as gutters to lead any rainwater which may fall upon the roof in courses longitudinal of the boards and minimize any transverse flow of water with respect to the joints between the roof-boards.

Within the casing 8 is a ventilator-opening 20 through which access is had to the interior of the silo. For said opening there is provided a removable cover 21, Fig. 2, preferably constructed with a depending cylindrical portion 22 which is adapted to fit into the casing.

23 represents tie-members which can be used to prevent spreading of the rafters. These tie-members, however, are not essential, as the same office may be performed by spiking the rafters to the silo-wall.

24 represents horizontal members secured to the rafters for supporting the roof boards of the various panels. a

In the construction of a roof, the radially disposed rafters 6 are secured at their upper ends to the annular casing S, and their lower ends rest upon the wall 9. The roof boards 14: are then introduced within the several openings between the adjacent rafters, commencing in each case with the longer boards, and inserting the others progressively by shorter and shorter lengths until the respective panels are completed. In thus assembling a panel, each of the compo nent boards rests upon the wall, and the slight are or curvature required is accomplished in the tongue and groove joints, and is so relatively small that there is no appreciable opening at the connection of the roof board with the wall or at the juncture with the rafters. The panel boards are then secured by nails and the roof is completed.

l/Vhat I claim, is

1. A roof for circular structures, comprising in combination with the wall of the structure, and a centrally-disposed apertured rabbeted cap, a plurality of rafters radially-disposed with respect to the cap and supported at their ends by said cap and the wall of the structure respectively, each rafter provided on opposite sides with a longitudinallyextending groove adjacent the upper edge thereof, and panels for closing the spaces between the rafters, each panel comprising a series of interfitting boards of lengths increasing from one side of a panel to the opposite side thereof, each board of a panel being parallel to the rafter on one side thereof and angular with respect to the rafter on the other side thereof.

2. A roof for circular structures, comprising, in combination with the wall of the structure and a centrally-disposed cap, a

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

plurality of rafters radially disposed with respect to the cap and supported at their ends by said cap and the wall of the structure, respectively, and panels for closing the spaces between the rafters, each panel comprising a series of interfitting boards of lengths increasing from one side of a panel to the opposite side thereof, each board of a of a panel to the opposite side thereof, each board of a panel being parallel to the rafter on one side thereof and angular with respect to the rafter on the other side thereof.

VILLIAM D. PLUE. Witnesses:

H. BARNES, E. PETERSON.

Washington, D. 0. 

